Back test error: Scripts generated no trades

Hi, I am getting the error “Scripts generated no trades” when I am trying to Backtest the following strategy on ASHOKLEY:

Buy Script
CROSSOVER(EMA(CLOSE, 20), EMA(CLOSE, 60))

Sell Script
CROSSOVER(EMA(CLOSE, 60), EMA(CLOSE, 20))

Exit Long Script
CROSSOVER(CLOSE, PSAR(CLOSE, 0.02, 0.2))

Exit Short Script
CROSSOVER(PSAR(CLOSE, 0.02, 0.2), CLOSE))

What is the error?